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Family name Runn (Runn , Ruln, วิ่ง) , throughout the world, is a rare last name. The last name Runn is habitual in Malaysia, where it is a rare surname, Sweden, and Finland, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Malaysia, the United States, and Indonesia. Very seldom, Runn is the forename as well as the last name.